I was convinced this took me around 40 hours, but no, just under 28. It just felt much longer than the other picross titles I’ve played on the 3DS, but it’s about par for them.
There’s not a lot else to say, really. It’s picross, with Sanrio (think Hello Kitty) characters as the puzzles. There are loads of stickers to unlock, but they’re of little use as you can’t take screenshots, but the main picross is the same picross as picross ever was.